powerpc/microwatt: add POWER9_CPU, clear PPC_64S_HASH_MMU

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Microwatt implements a subset of ISA v3.0 (which is equivalent to
the POWER9_CPU option). It is radix-only, so does not require hash
MMU support.

This saves 20kB compressed dtbImage and 56kB vmlinux size.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-19-npiggin@gmail.com

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Nicholas Piggin 2021-12-02 00:41:53 +10:00 • committed by Michael Ellerman

parent 387e220a2e

commit 31284f703d

2 changed files with 2 additions and 2 deletions

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3

arch/powerpc/configs/microwatt_defconfig

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1

arch/powerpc/platforms/microwatt/Kconfig

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